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  <head>
    <meta charset="UTF-8" />
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    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <ul id="father">
      我是一个列表
      <li id="son">第1个</li>
    </ul>
    <script>
      document.getElementById('father').addEventListener('click', function (e) {
        console.log(111);
      });
      document.getElementById('son').addEventListener('click', function (e) {
        console.log(222);
        e.stopPropagation();
      });
    </script>
  </body>
</html>
